Re: [Dri-devel] Question: gcc -nostartfiles

[Keith W. <ke...@pr...>]

Brian Paul wrote:
> 
> libGL.so needs to define an _init() function in order to correctly handle
> dynamic registration of GL extensions.
> 
> When making the shared libGL.so library, I need to stop gcc from
> including the normal _init() function.  If I don't then _init()
> is defined multiple times (an error).
> 
> Apparently there are two gcc linker options which can prevent _init()
> from being defined:  -nostartfiles and -nostdlib.  I believe that
> -nostartfiles is the right choice but since I've never used this
> feature before I thought I'd bring it up here to be sure.
> 
> Here's how I modified xc/lib/GL/Imakefile to pass the -nostartfiles
> flag:
> 
> #if BuildXF86DRI && HasGcc
>         OBJS += -nostartfiles
>         UBJS += -nostartfiles
>         DOBJS += -nostartfiles
>         POBJS += -nostartfiles
> #endif
> 
> Let me know if this is the wrong way to do this.
> 
> Thanks.


Brian,

Why not just use an 'attribute __constructor__' tag on a regular function, in
the same way lowpc.c/highpc.c do?  Then you could leave init alone...

Keith